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Science 3 December 1999:
Vol. 286. no. 5446, pp. 1862 - 1863
DOI: 10.1126/science.286.5446.1862b
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Perspectives

PALEOCEANOGRAPHY:
Tracing Past Ocean Circulation?

Friedhelm von Blanckenburg

To understand how ocean circulation and climate may change in the future, we must first understand how the system operated in the past, without man's influence. New inorganic isotopic tracers are now helping to elucidate past ocean circulation patterns, but controversies remain regarding the relative influence of ocean circulation and weathering on the isotopic signals.

The author is in Isotope Geology, University of Berne, Erlachstrasse 9a, 3012 Berne, Switzerland. fvb{at}mpi.unibe.ch

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Science. ISSN 0036-8075 (print), 1095-9203 (online)